Speed-reducing gearing.



J. NEILL.

SPEED REDUCING GEARING.

APPLICATION FILED APR.20, 1914.

Patented; May 11, 1915.

EDEN NEILL, OF HONOLULU, TERRITORY OF HAVAII.

PEED-E-EDUGING GEARING'.

Specification of Letters Eatent.

' -A. e a w Patented The a r, alio.

Application .filed April 550, 1914. Serial No. 833,123. v

T all whom it may) concern:

Be it known that 1, JOHN NEILL, a citizen of the United States, residing at, Honolulu,

county of Honolulu, 'lerritory of Hawaii,

have invented certain new and useful improvements. in Speed-Reducing Gearing;

and I do hereby declare the following to he I a full, clear, and eXact description of the 111' vention, such as will enable others skilled in the art to which it appertains to make and use'the same.

This invention relates to speed reducing ,gearing for operatively connecting two shafts such that the speed of one of the shafts will be reduced, and particularly to gearing of this character adapted-to be applied in a direct line between and to connect the shaft of the higher speed motor and the shaft of the slower speed machinery to be driven thereby. I

Motors, such as g2 solene, electric, or steam turbines, which have lately come into favor, have their greatest eiiiciency when running at a relatively high rate oi speed. It seldoni, however, that themachinery to be driven can be directly connected to such motor on account of this difference between the speed of the machinery to be driven and that of the motor, and consequently various devices have been employed to meet this condition.

The present invention contemplates gearing, which can be easily introduced between the. hi gher speed motor and the slower speed machinery to be driven, to connect their shafts arranged in direct line with one another, and give any desired reduction in the speed. Such gearing is particularly appli cable, for example, for connecting peller shaft oi a vessel with the shaftof a hi 7 speed motor, such as a steam turbine. ine invention 4 comprises, a stationary housing provided with internal spur gear, a pinion secured to the hia'her speed shaft, one or more intermediate gears adapted to mesh with both the internal gear and the pinion and to revolve journaled in member whichattaches to the slower speed shalt and which revolves in said housing, as

will hereinafter more fully appear. Thepitch, the face, and the number of teeth of the pinion, the internal-gear and the intermediate gears, depend upon the power to be transmitted and the reduction in speed desired. I A reduction in speed of from five to one up to twentyto one may easily be attained' by the device contemplated. l i hen the space to receive the housing is limited, however, two or more of these sets of gearing may be placed in tandem, and any desired reduction in speed may thus be had. Of course, ball or roller bearings and other refinements may, if desired, be employed to reduce the friction. f

This specificatiouis a specific description of one form of the invention ,wvhile the claims are definitions of its actual scope.

The invention consists in the construction,

arrangement and combination of parts here inafter described and claimed, reference bcing had to the accompanying drawings,

forming which Figure 1 is a longitudinal sectional elevation of the improved gearing and its housing. 2 is a view on the line-AB of Fig. 1.

Referring to the drawings, the housing 8 is provided with the internal. spar gear i,

a part of this specification, in

which may either he bolted thereto or be integral thereof as shown. The housing 3 is stationary and may be secured in its proper position by bolts through the holes 5 in the base 6. The annular tongue '7 on the lions ing 3 is adapted to fit in the corresponding groove 8 in the 9. The ring is bolted to the housing 3 by the bolts 10 through the lugs 11 and 12 on the housing 3 and the ring respectively. The spur pinion 13 is keyed on the end of the higher speed shaft is. The hub 15 of the ca 16 is bored to fit and be keyed on the end of the slower speed shaft '17. If preferred. the flange 18 of the cast ing 16 may he bolted to a flange 19 k YQfil on the end oi said shaft 17. The casting 1G is provided with an annular tongue 20 adapted to fit in a corresponding groove 21 in the flat ring shaped cover i his cover 22 is bolted to the casting 16 by bolts although more or less may be employed. The cast-inn it;

is provided with suitable rec secs 2? to clear the intermediate gears 24-. lhe shafts.

ortrunnions 25 are journa-led in the castmg 16 and cover 22 respectively.

' casting 16,,and the shaft gears travel around 26 of the internal gear ternal gear 4:, and

the pinion 13 has twenty teeth and the internal gear has ei hty teeth, so that the shaft 14 will make Eve complete revolutions to onerevolution of the shaft 17, instead of four revolutions as might at first sight be supposed on account of the ratio of four to one and the pinion. This is due to the fact thatthepinion 13 has to revolve therintermediate gears 24 to cause them tdtravel around the stationary in lution of the.

ternal gear 1-. When an intermediate gear 24 is moved, for'example, say ten teeth of theinternal gear 4, or one-eighth ofa revoshaft 17, the pinion 13 has revolved twelve and a' half teeth, or fiveeighths of a revolution of the shaft 14, which is five times that of the shaft 17 claim: L

1. Speed reducing gearing comprising, a stationary housing, a ring bolted to said housing, an internal gear within sa idhousing, 'a pinion on the adapted to be attached to the lower speed shaft, and a cover secured to said casting, each shaft of the intermediate gears journaled in said casting tatably mounted in the -ciated with the housing,

' rest line with one another. Inthe drawings,

' shaft connected to the second 3. bpeed reducing gearing,

higher speed shaft, oneor more ntermediate gears meshing with W said internal gear and said pinion, a casting in presence of two witnesses.

1,1ee,eee

and cover, the casting and cover adapted. to' turn in the housing and ring, substantially described.

2. Speed reducing gearing, stationary housing, disk-like side covers roing therewith an inclosed a shaft entering one-side of said housing throughv one of said side covers, a pinion associated therewith, an internal gear assoa pinion. interposed between and meshing with said'first-named pinion and the internal gear and journ'aled in both of said side covers, and a second rotatable side cover,for the purpose described.

comprising a stationary housing provided with an internal gear, rotatable side covers associated with thehousing and forming therewith an 'inclosed gear compartment, a ring secured to the housing at at least one side'thereof in which the corresponding rotatable side cover is mounted, a shaft entering one side of said housing through one of said side covers, a pinion associated therewith, a pinion -interposed betweenand meshing with said first-named pinion and the internal gear and journaled in both of said side i covers, and'a second shaft connected to the second rotatable side cover, for the purpose described.

' In testimony whereof I affix my signature,

JOHN nEiLL.

Witnesses:

Roe'r. J. PnATi, P. H. BURNEITE.

comprising a housing and formgear compartment, 

